one of a number of families into which the family Polypodiaceae has been subdivided in some classification systems; Pteridaceae is itself in turn sometimes further subdivided
Pteridaceae的用法和样例:
例句
The Pteridaceae has been variously classified by different taxonomists. 中文摘要凤尾蕨科的范围长久以来存在著许多不同的分类意见。